Hi Requirements are not clear enough. But I can help you in making prototype of Hash of Arrays from the above data. 

#!/usr/bin/perl
use strict;
use warnings;

my $file = "File_Path";

open FH, $file, or die "Can't open $file $!\n";
my %hash = ();
while(<FH>){
  my @array = split(/ +/, $_);
  $hash{$array[0]}{$array[1]}{$array[2]} = $array[3];
}
print Data::Dumper(%hash);
# Hash array created in the format
# server01: => {2015-06-23T21:58:05-05:00 => FC_IO_BY_R = #13,550,785}

[download]

Now you have a hash with you, if you want to subtract the previous value, you might have to use offset. Might be you have to save previous value in a file or somewhere in database. I hope it helps!!

In reply to Re: Analytics on Hash Arrays by akuk
in thread Analytics on Hash Arrays by yasser8@gmail.com

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